Agricultural Entomology - Study Mode

[#426] Petrobia latens is
Correct Answer

(C) Brown wheat mite

Explanation

Solution: Petrobia latens is Brown wheat mite. It is its common name. The brown wheat mite is a pest of small grains in most parts of the world, but may also damage onion, carrots and many other crops. The mites feed only on leaves, which results in leaf yellowing and mottling, unhealthy grain formation and wilting and dying of plants. It is a vector of barley yellow streak mosaic virus, which has been reported to cause yield losses to spring-planted barley by over 30%. The virus also infects wheat, reducing yields. In addition, the mite may sometimes be a nuisance in houses.

[#427] Stylet knobs are tulip shaped in
Correct Answer

(A) Haplolaimus

Explanation

Solution: Stylet knobs are tulip shaped in Haplolaimus. The lip region is elevated and high arched the labial disc is usually distinct. The cephalic framework is strongly sclerotized. The stylet is strong with rounded, indented, and sometimes anchor- or tulip-shaped knobs. The median bulb is strong and rounded.

[#428] Trade name of Tebufenozide is?
Correct Answer

(B) Mimic

Explanation

Solution: Trade name of Tebufenozide is Mimic. It is Mimic 700 WP Insecticide, and Mimic 240 SC Insecticide. Whereas, the chemical name is 4-ethylbenzoic acid-N'-tert-butyl-N'- (3,5-dimethyl-benzoyl) hydrazide (IUPAC) Benzoic acid, 3,5-dimethyl-1-(1,1-dimethylethyl)-2-(4-ethyl-benzoyl)hydrazide (CA). It is an insecticide that acts as a molting hormone. It is an agonist of the ecdysone receptor that causes premature molting in larvae. It is primarily used against caterpillar pests.

[#429] Rotenone is a broad spectrum contact and stomach poison and affect nerve and muscle cells in insects, derived from
Correct Answer

(D) Roots

Explanation

Solution: Rotenone is a broad-spectrum contact and stomach poison that affect nerve and muscle cells in insects, derived from Roots. Rotenone is an odorless, colorless, crystalline isoflavone used as a broad-spectrum insecticide, piscicide, and pesticide. Rotenone is produced by extraction from the roots and stems of several tropical and subtropical plant species, especially those belonging to the genera Lonchocarpus and Derris. It is a commonly used pesticide and is also used in lakes and reservoirs to kill fish that are perceived as pests. Human deaths from rotenone poisoning are rare because its irritating action causes vomiting. Deliberate ingestion of rotenone can be fatal.

[#430] Anguina balsamophila forms galls on
Correct Answer

(D) Leaf

Explanation

Solution: Anguina balsamophila forms galls on Leaf. It is an ectoparasite that becomes endoparasitic invading inflorescence and developing seeds. It causes a disease called "ear-cockle", "gout" or seed gall on wheat and rye. It does not infest oat, maize and sorghum. On wheat it causes stunted plants and distorted leaves. Seeds are transformed into galls which contain a dried mass of nematodes.